Sandpapering-machine.



. PATENTED FEB. 5, 190v. J. GRAMELSPAGHER. SANDPAPERING MACHINE. APPLICATION FILED FEB. 13, 1906.

2' SHEETS-SHEET 1.

WITNESSES.-

" PATENTED FEB. 5, 1907.

J. GRAMELSPAGHER. SANDPAPERING MACHINE APPLIOA TION FILED P313313, 1906 A TTOR/VE Y5 JOHN- GRAMELSPAOHER, or JASPER, INDIANA.

S ANDPAPEFllNG-MACHINE.

s ecification of Letters Patent.

Patented Feb. 5, 1907.

' Application filed February 13, 1906. Serial No- 800,900.

To all whom it may concern:

Be it-known that I, J OHN GRAMELsPAoHER, a citizen of the'United States, residing at Jasper, in the county of Dubois-and State of Indiana, have invented a new and useful Sandpapering-Machi'ne, of which the follow ing is a specification.

This invention relates to polishing and sandpapering machines, and 1s particularly designed for sandpapering the sides of formture-drawers, so as .to fit. the same to their guideways. In this connection it is proposed to employ endless abrading-belts for simultaneous engagement with opposite sides of a drawer and mounted to travel'toward the work-holder, thereby to exert a tendency to hold the work to its support.

. A further object of the invention is to conveniently effect adjustmentof the abradingbelts so as to'accommodate the machine to drawers of different widths.

With these and other'objectsin view the present invention consists in the combination and arrangement of parts, as will be hereinafter more fully described, shown in the accomp anying, drawings, and particularly pointed out in the appended claims, it being understood that changes in the form, prochine.

portion, size, and minor details ma be made within the'sco e ofthe claims without departingfrom the spirit or sacrificing any of the advantages of the invention.

In the drawings, Figurel is a side elevation of a s'andpapering-machine embodying the features of the resent invention. Fig. 2 is a cross-sectiona view-on the line 2 2 of Fig. 1. Fig. 3 is a top plan view of the ma Fig. 4 is a detail sectional view taken through one of the presser devices for holding the abrading-belt.againstthe workQ Fig. 5 an enlarged fragmentary sectional view taken through the suction-trough and the overlap ed closures for the middle por-' tion thereof? I Like characters 'of reference designate corresponding parts in all of the figures of the drawings.

For the support of the operating parts of the present machine there is provided a air of substantially parallel sills 1, having t eir upper faces provided with tracks or guideways 2, (pre erably longitudinal ribs of inverted-V shape in cross-section,) the sills being laid upon a suitable s11 port, such as the floor 3 of the building in which the machine is located. 4

Slidably mounted upon the sills are duplidate carriages carrying duplicate mechanism for actuating the respective abrading-belts, wherefore a description of one carriage and the mechanism mounted thereon will suffice for both of them. Each carriage includes a base 3, restingupon the, to s of the sills and having grooves 5. in its under side receiving the guideways 2.. base there is secured a plate 6 by means of a To the under side of the threaded fastening 7 piercing the base and the plate, there-being such a fastening for each end of the late, and the upper side of each'end of the ase is reduced or recessed, as, at 8, so as to permit the upper end of the fastening 7 to lie below the top face of the i base. The late 6 is provid at opposite edges with flanges 9, working in grooves 10 in the inner faces of the sills 1,'thereby to prevent upward displacement of the carriage.

An arched standard 11 rises from the front of each. carriage and straddles one end of a shaft 12, which projects in front and rear of the carriage and carries upon its front end a relatively large. wheel 13 and at its rear end a small pulley 14. Above the wheel 13 there is apulley 15, mounted in an upright fork 16, having its stem received in a socket 17,, carried by a bracket 18, which is secured to the front face of the up er end portion of the adjacent standard. ound the wheel 13 and pulley 15 there runs an abradinge belt 19, having its working face sanded or otherwise roughened for operation upon woodwork.

In Fig. l of the drawings one of the socke'ts 17 has been broken away to show the mounting of the bracket 18. This bracket is in the nature of a plate having a web 23, which connects the socket 17 and the plate. A fastening 24 piercesthe bottom of the bracket and the standard to form a pivotal support for the bracket, there being an arcuate slot 25 formed in the upper end of the bracket and struck fromthe pivotal support 24 as a center.

A clamping-bolt or the like 26 is carried by the standard and rojects through the slot 25, whereby the racket may be adjusted to bring the active portion 19* of the .abrading-belt into a true vertical position. Vertical adjustment of the bracket 16 is accomplished by means of an adjustingstem 27 piercing the bottom of the socket 17,

'justed. By this means the abradi'ng-belt may be maintained in the desired taut condition.

For the support of the work each carriage is provided with a workholder made up of a substantially horizontal bar 29, extending from front to rear of the carriage at the inner edge thereof and supported at its rear end by a post 30, rising from the carriage, and at its front end upon a shoulder 31, rovided upon the adjacent standard 11, as est shown in Y Fig. 1 of the drawings. 'Upon the top of the bar and spaced from its inner longitudinal edge is an upstanding rib 32, constituting a guidewa for the ,work. By reference to Fig. 30f the drawings it will be understood that a drawer is placed upon the work-hold-' ers of the two carriages and locatedbetween the guide-ribs 32 and is pushed forwardly upon the support, and thereby guided between the ad acentNertically-dis osed active portions 19 of the abradingelts. It Willbe noted that the outer corner of the forwardend of each bar 31 is cut away, as at 33, to accommodate'the adjacent abrading-belt, and the guide-rib 32 terminatesat the inner end of the cut-away portion, whereby that portion of each side 0 the drawer which lies In front of the rib 32 is exposed tothe action of the adjacent abrading-belt.

A; single drive-belt 34 is employed to drive the two abrading-belts. This drive-belt em,-

braces a drive-pulley 35, preferably mounted below the floor, from which-it is su ported by one or more hangers 36-. The sha t 37 of the driveulley is driven in any suitable manner or instance, by a clutch-pulley 38, engaged by a power-belt 39. The drivepulley is rotatedin the direction of the arrow applied thereto, and the drive-belt. leads upwardly from the pulley to and around the u'lley 14 upon the adjacent shaft 12, thence own and around a belt-tightening pulley 40 bel'ow'the floor, thence up and. around. theother pulley 14, thence back and. above the first-mentioned pulley 14, around an idler 41, and

down to the drive-pu1l'ey 35. 'It will of course beunderstoodthat the floor or other support 3 is providedwlth a slot 42 in parallehsm with the back of the machine to accommodate the up and down portionsof thedrive-belt 34. j

The pulley 40 of the belt-tightener-has its shaft mountedinboxes 43, slidable vertically in slotted hangers 44, depending from the floor; A forkor oke 45 straddlesthetop of the pulley an i'sconnected to the boxes, while its stem 46 rises through the bore of the guide member 47, secured within the slot 42. A set-screw 48pierces the guide and engages the stem 46, so as to hold the latter rigid when adjusted to tighten the belt. It herebe noted that the top of the member 46 and the set-screw 48 are. conveniently accessible for 1 adjustment, while the belt- 'glhteningfpulley 40 is located some distance ow the oor. For the purpose of adjustably moving the carriages toward and away from one another there is (provided a rotatable adjusting-rod 49,

receive within grooves 50 in the tops of the carriages. One of the carriages is provided with smooth bearings 51, and the other carriage is provided with a threaded bearing 52 for the reception of the threaded portion 49? of the rod, the opposite end of the rod being provided with a and-wheel'or crank-handle 53. By rotating the rod 49 the carriages may be simultaneously drawn together and separated, so as to gage the same for drawers of difierent' widths. When setting the carriages, the set-screw 48 of the belt-tightener is released, in order that the pulley. 40 may rise or fall according as the carriages are being separated or drawn together, and after the carriages have been set the stem 46 of the belttightener is ushed down to properly tighten the drive-pu ley, and then the-set-screw 48 is tightened, so as to hold the belt-tightener in its set osition. 2'

It Wlll here be explained that the drive-belt travels in such a direction as to work the upright parallel active portions 19 of the abrad.' ing belts downwardly, as indicated by the arrows applied thereto, whereby the dust has a tendency to travel downwardly and is caught in a chute 54, which embraces that portion sucked down through thechute 54 and the s out 55 into the suction-trough 57 and'is thereby carried away from the machine.

The slot-,56.is closed at its top between the chute 54 by overlapped slides a and b, hinged to the respective spouts and slidably supported-upon the floor. The slidable closure (1 is provided at opposite edges with. longitudinal flanges c to embrace the member 6 and restu on the floor, so as to close-the space between t e edges of the slide and the floor.

A suitable closure 59 rests upon the floor and through which the.

covers the adjacent end portion of the openi hook 67, projecting forwardly fromthe upper It is proposed to press each abrading-belt against thework, and this is accomplished by means ofthe presser. (Shown in detail in Fig. 4 of the drawings.) Each standard 11 has an arm 61, overhanging the adjacent wheel 13 and pierced by a pair of adjusting-screws 62, which have their inner ends swiveled to the back member of the adjacent presser, which also includes a removable face member 64. The face of the presser is set against the back of the adjacent belt by adjusting the screws 62 until the belt is held against the work with the desired pressure; As the presser-face soon becomes worn under the action of the abrading-belt, it is proposed to enable the convenient removal of the face member. To

accomplish this feature, the rear side of the face member is provided with a' recess 65, in which'is a loop 66 to engage an upturned portion of the back member 63, the .lower end of the member 64 having a socket or seat 68 for the reception of a pin or projection 69,

carried by the back member 63.

In practice the carriages are set by manipulation of the hand-wheel 53 to receive the drawer between the guideways 32 of the workholder members 29, whereupon I the belt tightener is set and the presser devices are adjusted to hold'the abrading-belts against the drawer. The closure 58 for the middle portionof the opening. 56 is then adjusted,

and the machine is in condition for operation. I When the machine is set in operation, the abrading-belts work downwardly against opposite sides of the drawer, and as the drawer is worked back and'forth upon the workholder it is effectually dressed and smooth, all of the dust being carried down through the chute 54 and the spouts 55' into the suction-trough 57.

Having thus described the invention, what is claimed is 1. In a machine of the class described, the combination of carriages which are adjustable toward and away from one another, upright abrading-belts carried by the carriages with their inner active plies traveling downward, an adjustable presser-foot mounted on each 'earriage adjacent the abrading belt thereof,'substantially horizontal work-holding supports mounted upon the carria es and leadin i'nwarillybetween the active pfies and the beI just the carriages toward and away from one another. v j

2. In a sandpaperin machine, the combination with a support aving a slot therein,

of a guidewayupon the support in parallelism;

with the slot, carriages the carriages transadjust the brac et n 1011 its riage above the Work-h o1 ts, andmeans to simultaneously adversely of the slot and overhanging the same,

gaging the pulleys,a belt-tightener working through the slot, upright abradingbelts driven by the respective shafts, work-holder elements upon the carriage and .leading'in' wardly between the abradingbelts, and means for simultaneously adjusting the carriages toward and away from one another:

In a machine of the class described, the combination of a substantially horizontal work-h older, a belt-wheel having a fixed position below the work-holder, a pulley located above the-work-holder, an abrading-belt engaging the wheel and the pulley, means T for simultaneously moving the wheel, pulley, and belt, a bracket carrying the pulley and'- pivotally'mounted u on the support, and means to ivotal support to set the active ply o the be t with respect to the work-hold er. H

4. In a machine of the class described, the

combination of spaced carriages, means to adjust the carriages toward and away from one another, work-holding elements upon the carriages, a belt-wheel upon each carriage below the work-hold er, a pulley upon each card er, an abrading-belt engaging a Wheel and pulley of each carriage, means for simultaneously moving the wheel, pulley, and belt, and means to adjust each pulley to set the active pdy of its belt with respect to the work-holder.

5. In a machine of the class described, the combination with an abrading belt, of a presser therefor having a hook and a projection upon its front face, and a removable wear-face having aloop-to receive'the hook V and a socket to receive the projection.

6. In a sandpapering-machin'e the combination with opposite carriages, and means at one end of the machine for simultaneousl adjusting the carriages toward or from each other; of an 'abrading-helt carried by and movable with each carriage, said belts being movable bodily toward and from each other withthe carriage, a work-holder upon each carriage, said holders projecting betweenthe IIO belts, and a presser-foot adjustably mounted u on each carria e and bearing upon the belt a jacent the wor r-holder. j

7. In a sandpapering-machine the combination with sills, carriages slidably mounted thereon, means upon each carriage for engaging the sills to prevent displacement of the carriage, and means operated from one end of themachine for simultaneously adjusting the carriages toward and from each other; of

an abrading-belt uponeach-carriage, the ad'- joining plies of said belt moving in the same direct1on, a driveshaft, a flexible element operated by said shaft for actuating the abrading-belts independently of the adjustment of the carriage, means for maintaining saiel (ale-1 my own I have hereto afiixed my signature-in ment normiaily taint-i; a1 (vivork-ho1d11;-1u%on each I the presence oftwo witnesses. carria e sa' wor 0 ers exten etweenh thead ioiningzplies 0i theabmding-fieltg-and JOHW GRAMELSPAOHER' a an adjustable: ressr-foet upon each carriage- Witnesses:-

and adjacent t e wqrk-holder. .Loms T. Konnnnn, In fcestimony ahqlt I claimthe foregoing. as: A ANTHONY LARGE. 

